Set screw



FIG. 1 is a front perspective view of a first embodiment of a set screw in accordance with the present invention;

FIG. 2 is a side view of the set screw of FIG. 1;

FIG. 3 is a front view of the set screw of FIG. 1; and,

FIG. 4 is a rear view of the set screw of FIG. 1.

The broken lines shown in the Figures represent portions of the set screw that form no part of the claimed design. 

CLAIM The ornamental design for a set screw, as shown and described. 